Notes

Compliance with ethical standards

Conflict of interest

The authors declare no conflicts of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study, formal consent is not required.

Supplementary Fig. S2 Kaplan-Meier curves showing local tumor control rates according to the tumor volume. The local progression-free survival at 12 months after gamma knife radiosurgery was 88.8% in patients with tumor volumes ≤3 mL and 71.3% in those with tumor volumes &#x003E;3 mL (PDF 93 KB)